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Europium and dysprosium co-doped strontium magnesium silicate luminescent nanofiber and preparation method thereof

A technology of strontium magnesium silicate and nanofibers, which is applied in the field of inorganic nanoluminescent materials and their preparation

Inactive Publication Date: 2014-07-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, no Sr 2 MgSi 2 o 7 :Eu 2 +, Dy 3+ Related reports on luminescent nanofibers

Method used

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  • Europium and dysprosium co-doped strontium magnesium silicate luminescent nanofiber and preparation method thereof
  • Europium and dysprosium co-doped strontium magnesium silicate luminescent nanofiber and preparation method thereof
  • Europium and dysprosium co-doped strontium magnesium silicate luminescent nanofiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: Weigh 10.6mg Eu 2 o 3 (purity 4N) and 22.4mg Dy 2 o 3 (purity 3N), heated at 60°C and dissolved in 2-3mL of concentrated nitric acid, continued heating to evaporate excess nitric acid to obtain Eu(NO 3 ) 3 and Dy(NO 3 ) 3 of mixed crystals, adding according to 0.003mol Sr 2 MgS7 2 o 7 The stoichiometric ratio of 1.27g Sr(NO 3 ) 2 and 0.769g Mg(NO 3 ) 2 ·6H 2 O (both analytically pure), then add 30g N, N-dimethylformamide (DMF, analytically pure), magnetically stir several minutes at room temperature until Eu(NO 3 ) 3 and Dy(NO 3 ) 3Mixed crystals of Sr(NO 3 ) 2 , Mg(NO 3 ) 2 ·6H 2 O is completely dissolved, then add 1.245g tetraethylorthosilicate (TEOS, analytically pure) and 1.245g absolute ethanol (analytical pure), finally add 3.5g polyvinylpyrrolidone (PVP, molecular weight 1300000), and magnetically Stir for more than 5 hours until a uniform transparent viscous liquid is formed, and stand still for 3-5 hours to discharge air bubb...

Embodiment 2

[0020] Embodiment 2: Weigh 35.2mg Eu 2 o 3 (purity 4N) and 74.6mg Dy 2 o 3 (purity 3N), heated at 60°C and dissolved in 3-5mL of concentrated nitric acid, continued heating to evaporate excess nitric acid to obtain Eu(NO 3 ) 3 and Dy(NO 3 ) 3 of mixed crystals, adding according to 0.01mol Sr 2 MgSi 2 o 7 The stoichiometric ratio weighed 4.043g Sr(NO 3 ) 2 and 2.565g Mg(NO 3 ) 2 ·6H 2 O (both are analytically pure), then add 83.4g N, N-dimethylformamide (DMF, analytically pure), magnetic stirring several minutes at room temperature until Eu(NO 3 ) 3 and Dy(NO 3 ) 3 Mixed crystals of Sr(NO 3 ) 2 , Mg(NO 3 ) 2 ·6H 2 O is completely dissolved, then add 4.167g tetraethyl orthosilicate (TEOS, analytically pure) and 4.167g dehydrated alcohol (analytical pure), finally add 10.95g polyacrylonitrile (PAN), stir magnetically at room temperature for 8~ 10h, until a uniform transparent viscous liquid is formed, let stand for 4-6h to discharge air bubbles, and obtain t...

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Abstract

The invention relates to the fields of inorganic luminescent nanomaterials and preparation thereof and particularly relates to a europium and dysprosium rare earth ion co-doped strontium magnesium silicate luminescent nanofiber and a preparation method thereof. The europium and dysprosium rare earth ion co-doped strontium magnesium silicate luminescent nanofiber is characterized by being of a continuous one-dimensional nanostructure, wherein Sr2MgSi2O7 is used as a substrate, Eu<2+> and Dy<3+> rare earth ions are used as activating agents, a crystal is of an akermanite structure of a tetragonal crystal system, and the europium and dysprosium rare earth ion co-doped strontium magnesium silicate luminescent nanofiber can emit blue visible light with the wavelength close to 470nm after being irradiated by ultraviolet rays or visible light for 1-10min. The luminescent nanofiber is used for preparing a precursor solution suitable for electrostatic spinning through a sol-gel technology, then, a precursor nanofiber is prepared through electrostatic spinning and is calcined at a weak reducing atmosphere, and finally, the Sr2MgSi2O7: Eu<2+> and Dy<3+> luminescent nanofiber is obtained.

Description

technical field [0001] The invention relates to the field of inorganic nano-luminescent materials and their preparation, in particular to a rare-earth-doped magnesium-strontium silicate luminescent nano-fiber and its preparation technology. Background technique [0002] Nanofiber refers to a linear material with more than two dimensions in the nanometer scale on the three-dimensional space scale. Generally, the radial scale is nanoscale and the length is relatively large. Due to its special nano-scale structure, it shows many peculiar properties, the most prominent is the large specific surface area, which leads to high surface energy and high activity, which in turn produces small size effects, surface or interface effects, quantum size effects, and macroscopic quantum tunneling effects. etc., and therefore exhibit some special chemical and physical (optical, electrical, magnetic) properties. [0003] As an important long-lasting luminescent material, rare earth silicate l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01D5/00C09K11/59
Inventor 罗军葛明桥陈志张开砚
Owner JIANGNAN UNIV
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